Supplemental Financial Information - Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,904			$ 1,533
Accounts and notes receivable, net	589			527
Inventories, net	87			84
Prepaids and other current assets	85			52
Total current assets	2,665			2,196
Property and equipment, net	1,975			2,007
Operating lease assets, net	1,122			1,176
Intangible assets, net	10,415			10,563
Goodwill	5,571			5,651
Net investment in property leased to franchisees	63			48
Intercompany receivable	0			0
Investment in subsidiaries	0			0
Other assets, net	722			719
Total assets	22,533			22,360
Current liabilities:
Accounts and drafts payable	523			644
Other accrued liabilities	883			790
Gift card liability	108			168
Current portion of long-term debt and finance leases	107			101
Total current liabilities	1,621			1,703
Long-term debt, net of current portion	12,300			11,759
Finance leases, net of current portion	304			288
Operating lease liabilities, net of current portion	1,054			1,089
Other liabilities, net	1,917			1,698
Payables to affiliates	0			0
Deferred income taxes, net	1,422			1,564
Total liabilities	18,618			18,101
Partners’ capital:
Common shares	0			0
Retained Earnings	0			0
Accumulated other comprehensive income (loss)	(1,526)			(1,178)
Total Partners’ capital	3,911			4,255
Noncontrolling interests	4			4
Total equity	3,915	$ 3,852	$ 3,752	4,259	$ 4,063	$ 3,960	$ 3,773	$ 3,618
Total liabilities and equity	22,533			22,360
Class A common units
Partners’ capital:
Class A common units	8,005			7,786
Total equity	8,005	7,947	7,840	7,786	7,753	4,495	4,423	4,323
Partnership exchangeable units
Partners’ capital:
Partnership exchangeable units	(2,568)			(2,353)
Total equity	(2,568)	$ (2,526)	$ (2,370)	(2,353)	$ (2,358)	$ 746	$ 737	$ 730
Eliminations
Current assets:
Cash and cash equivalents	0			0
Accounts and notes receivable, net	0			0
Inventories, net	0			0
Prepaids and other current assets	0			0
Total current assets	0			0
Property and equipment, net	0			0
Operating lease assets, net	0			0
Intangible assets, net	0			0
Goodwill	0			0
Net investment in property leased to franchisees	0			0
Intercompany receivable	(243)			(232)
Investment in subsidiaries	(3,915)			(4,259)
Other assets, net	0			0
Total assets	(4,158)			(4,491)
Current liabilities:
Accounts and drafts payable	0			0
Other accrued liabilities	0			0
Gift card liability	0			0
Current portion of long-term debt and finance leases	0			0
Total current liabilities	0			0
Long-term debt, net of current portion	0			0
Finance leases, net of current portion	0			0
Operating lease liabilities, net of current portion	0			0
Other liabilities, net	0			0
Payables to affiliates	(243)			(232)
Deferred income taxes, net	0			0
Total liabilities	(243)			(232)
Partners’ capital:
Common shares	(3,369)			(3,248)
Retained Earnings	(2,068)			(2,185)
Accumulated other comprehensive income (loss)	1,526			1,178
Total Partners’ capital	(3,911)			(4,255)
Noncontrolling interests	(4)			(4)
Total equity	(3,915)			(4,259)
Total liabilities and equity	(4,158)			(4,491)
Eliminations | Class A common units
Partners’ capital:
Class A common units	0			0
Eliminations | Partnership exchangeable units
Partners’ capital:
Partnership exchangeable units	0			0
Consolidated Borrowers | Reportable Legal Entities
Current assets:
Cash and cash equivalents	1,904			1,533
Accounts and notes receivable, net	589			527
Inventories, net	87			84
Prepaids and other current assets	85			52
Total current assets	2,665			2,196
Property and equipment, net	1,975			2,007
Operating lease assets, net	1,122			1,176
Intangible assets, net	10,415			10,563
Goodwill	5,571			5,651
Net investment in property leased to franchisees	63			48
Intercompany receivable	0			0
Investment in subsidiaries	0			0
Other assets, net	722			719
Total assets	22,533			22,360
Current liabilities:
Accounts and drafts payable	523			644
Other accrued liabilities	640			558
Gift card liability	108			168
Current portion of long-term debt and finance leases	107			101
Total current liabilities	1,378			1,471
Long-term debt, net of current portion	12,300			11,759
Finance leases, net of current portion	304			288
Operating lease liabilities, net of current portion	1,054			1,089
Other liabilities, net	1,917			1,698
Payables to affiliates	243			232
Deferred income taxes, net	1,422			1,564
Total liabilities	18,618			18,101
Partners’ capital:
Common shares	3,369			3,248
Retained Earnings	2,068			2,185
Accumulated other comprehensive income (loss)	(1,526)			(1,178)
Total Partners’ capital	3,911			4,255
Noncontrolling interests	4			4
Total equity	3,915			4,259
Total liabilities and equity	22,533			22,360
Consolidated Borrowers | Reportable Legal Entities | Class A common units
Partners’ capital:
Class A common units	0			0
Consolidated Borrowers | Reportable Legal Entities | Partnership exchangeable units
Partners’ capital:
Partnership exchangeable units	0			0
RBILP | Reportable Legal Entities
Current assets:
Cash and cash equivalents	0			0
Accounts and notes receivable, net	0			0
Inventories, net	0			0
Prepaids and other current assets	0			0
Total current assets	0			0
Property and equipment, net	0			0
Operating lease assets, net	0			0
Intangible assets, net	0			0
Goodwill	0			0
Net investment in property leased to franchisees	0			0
Intercompany receivable	243			232
Investment in subsidiaries	3,915			4,259
Other assets, net	0			0
Total assets	4,158			4,491
Current liabilities:
Accounts and drafts payable	0			0
Other accrued liabilities	243			232
Gift card liability	0			0
Current portion of long-term debt and finance leases	0			0
Total current liabilities	243			232
Long-term debt, net of current portion	0			0
Finance leases, net of current portion	0			0
Operating lease liabilities, net of current portion	0			0
Other liabilities, net	0			0
Payables to affiliates	0			0
Deferred income taxes, net	0			0
Total liabilities	243			232
Partners’ capital:
Common shares	0			0
Retained Earnings	0			0
Accumulated other comprehensive income (loss)	(1,526)			(1,178)
Total Partners’ capital	3,911			4,255
Noncontrolling interests	4			4
Total equity	3,915			4,259
Total liabilities and equity	4,158			4,491
RBILP | Reportable Legal Entities | Class A common units
Partners’ capital:
Class A common units	8,005			7,786
RBILP | Reportable Legal Entities | Partnership exchangeable units
Partners’ capital:
Partnership exchangeable units	$ (2,568)			$ (2,353)